期刊
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
卷 28, 期 3, 页码 431-441出版社
WILEY
DOI: 10.1111/j.1751-908X.2004.tb00761.x
关键词
boron; boron isotopes; silicate reference material; mass spectrometry; in situ
We present boron isotope and concentration data from magmatic (komatiitic to rhyolitic) and sedimentary geological silicate and artificial glass reference materials that cover a wide spectrum of boron isotope compositions and boron concentrations. Boron isotope compositions were determined by TIMS (Cs2BO2+-graphite and BO2- method) and boron concentrations by ICP-AES. Boron concentrations ranged from 7 to 159 mu g g(-1) and agree within 14% with published values. Based on replicate analyses of individually prepared sample aliquots an overall external reproducibility of better than 10% was determined. The obtained delta B-11 values ranged from -12.6 to + 13.6 parts per thousand and were reproducible within 1.1 parts per thousand (2 RSD; excluding NTIMS) on the basis of individually prepared sample aliquots. The delta B-11 values of JA-1 (+5.3 parts per thousand), JB-3 (+5.9 parts per thousand) and JR-2 (+2.9 parts per thousand) overlap the published data within analytical uncertainty. For the first time delta B-11 values for the TB (-12.6 parts per thousand) and the MPI-DING glasses GOR-128-G (+13.6 parts per thousand), GOR-132-G (+7.1 parts per thousand) and StHs6/80-G (-4.5 parts per thousand) are reported. The delta B-11 values obtained by the Cs2BO2+-graphite and the BO2- method as well as the majority of delta B-11 values obtained using different sample preparation methods agree within analytical uncertainty. Therefore, we conclude that none of these analytical methods introduce any systematic error on the obtained delta B-11 values.
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